If we've learned anything so far this year it's that the newly and heavily pro-friendship Taylor Swift really loves Haim. The indie rock superstars were punching above their weight class mugging it up with A-list celebs at Taylor's birthday, and recently the three sisters went on vacation with her to Hawaii. This summer, they'll open up for Swift on a handful of dates on her 1989 tour. Fingers crossed Alana Haim will be cool if one of her exes ends up tagging along.